US2737031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat energy-converting system and process
Assignee: Individual
•
Filing: 1952-02-12
•
Granted: 1956-03-06
•
Expires: 1972-02-12
Abstract
No abstract record available.
Inventors
- 👤 William A Wulle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:28
CPC Classifications
F; F25; F25B; F25B41/00; F25B1/00; F25B1/10; F25B9/00; F25B9/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US938253A
Cited
US1204918A
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US2100883A
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US2156096A
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US2394109A
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US2423183A
Cited
US2413796A
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US2519010A
Cited
US2494120A
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US2508397A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-06 | 1959-09-05 | 1960-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-06 | 1963-09-05 | 1964-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-06 | 1967-09-05 | 1968-03-06 | $7700.00 | Window Closed / Lapsed |